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https://issues.apache.org/jira/browse/SQOOP-1988?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14271528#comment-14271528
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Veena Basavaraj commented on SQOOP-1988:
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I am actually pretty confused at this point, sorry I did not understand this 
statement.

{quote}

Regarding the five cases "NULL" "null" "" look like a null of some database 
dump in CSV.

{quote}




 my question still remains on what do you propose a matched should do and 
should not do? and the matcher code should work with all IDFs, infact it has 
other issues I have seen when using avro IDF, that I am planning to create a 
ticket for 



> Sqoop2: isNull handling should be moved to CSVIntermediateDataFormat
> --------------------------------------------------------------------
>
>                 Key: SQOOP-1988
>                 URL: https://issues.apache.org/jira/browse/SQOOP-1988
>             Project: Sqoop
>          Issue Type: Sub-task
>            Reporter: Qian Xu
>            Assignee: Qian Xu
>             Fix For: 2.0.0
>
>
> The {{Matcher.getMatchingData}} method is expected to rearrange record fields 
> according to the FROM and TO schema. Currently here is an extra step in the 
> implementation, which will reset any {{null}} {{"NULL"}} {{"null"}} 
> {{"'null'"}} or {{""}} field to null. 
> As there is no comment or documentation about this, I guess it is some 
> undocumented special handling. [Here is some 
> discussion|https://issues.apache.org/jira/browse/SQOOP-1811?focusedCommentId=14270755&page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#comment-14270755].
> I think this check should not belong here. I propose to remove it. As the 
> method will be called very frequently, the code removal will have performance 
> advance. Thanks [~jerrychenhf]



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